I bought this a few years ago and it's been stored away ever since. The waist has elastic and there are small slits (about 15cm) on both sides. There is no lining, but the fabric feels very nice against the skin and is stretchy. It's an M size, but it feels like it's made a little larger. When laid flat, the waist is about 37cm and the length is about 80cm. Please use this as a reference.